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基于相关性度量的伪主成分分析 被引量:3
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作者 孙廷凯 冯爱民 陈松灿 《南京航空航天大学学报》 EI CAS CSCD 北大核心 2006年第6期732-736,共5页
采用数据样本间的相关性作为相似性度量,并引入样本的类信息,提出一种新的降维方法,即伪主成分分析(Pseudo-PCA),该方法尽可能地保持原样本的变化信息,同时又使得降维后的同类数据样本尽可能保持相似。此外,将这种思想方法成功推广到近... 采用数据样本间的相关性作为相似性度量,并引入样本的类信息,提出一种新的降维方法,即伪主成分分析(Pseudo-PCA),该方法尽可能地保持原样本的变化信息,同时又使得降维后的同类数据样本尽可能保持相似。此外,将这种思想方法成功推广到近年来提出的2DPCA,MatPCA和(2D)2PCA。在ORL,Yale和AR等人脸数据集上的实验表明,该类方法的识别率高于相应的基于欧氏距离的PCA,2DPCA,M atPCA和(2D)2PCA等方法。 展开更多
关键词 主成分分析 相似性度量 类信息 欧氏距离 人脸识别
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Gravity and Faster than Light Particles
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作者 Asher Yahalom 《Journal of Modern Physics》 2013年第10期1412-1416,共5页
In this paper, I discuss whether superluminal particles exist in the general relativistic theory of gravity. It seems that the answer to this question is negative. In truth, the result may only represent a difficulty ... In this paper, I discuss whether superluminal particles exist in the general relativistic theory of gravity. It seems that the answer to this question is negative. In truth, the result may only represent a difficulty to special but not general relativity, the later allowing both Lorentzian and Euclidian metrics. An Euclidian metric does not restrict speed. Although only the Lorentzian metric is stable, an Euclidian metric can be created under special gravitational circumstances and persist in a limited region of space-time causing possible superluminality. 展开更多
关键词 General RELATIVITY euclidian metric SUPERLUMINALITY
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How Quantum Mechanics and General Relativity Can Be Brought Together
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作者 Martin Suda 《Journal of Modern Physics》 2016年第6期523-527,共5页
This paper describes an easy and teaching way how quantum mechanics (QM) and general relativity (GR) can be brought together. The method consists of formulating Schrödinger’s equation of a free quantum wave of a... This paper describes an easy and teaching way how quantum mechanics (QM) and general relativity (GR) can be brought together. The method consists of formulating Schrödinger’s equation of a free quantum wave of a massive particle in curved space-time of GR using the Schwarzschild metric. The result is a Schrödinger equation of the particle which is automatically subjected to Newtons’s gravitational potential. 展开更多
关键词 Quantum Mechanics Schrödinger Equation General Relativity Newton’s Gravitational Potential Curved Space-Time Schwarzschild metric Non-euclidian Geometry
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